How Do Volcanoes Work? - From Vulcanus to magma

Softpedia: "The world 'volcano' comes from the Roman god of fire Vulcan, the equivalent of Hephaistos in the Greek mythology. In the ancient times, people attributed to the volcanoes a supernatural personality, which was worshiped. Old Greeks believed the Earth was a floating disc over the surface of an ocean whose storms triggered earthquakes and volcanic eruptions. .........